// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
////////////////////////////////////////////////////////////////////////////////

// Package mac provides implementations of the MAC primitive.
//
// MAC computes a tag for a given message that can be used to authenticate a
// message.  MAC protects data integrity as well as provides for authenticity
// of the message.
//
// Example:
//
//   package main
//
//   import (
//       "fmt"
//
//       "github.com/google/tink/go/mac"
//       "github.com/google/tink/go/keyset"
//   )
//
//   func main() {
//
//       kh, err := keyset.NewHandle(mac.HMACSHA256Tag256KeyTemplate())
//       if err != nil {
//           // handle the error
//       }
//
//       m := mac.New(kh)
//
//       mac , err := m.ComputeMac([]byte("this data needs to be MACed"))
//       if err != nil {
//           // handle error
//       }
//
//       if m.VerifyMAC(mac, []byte("this data needs to be MACed")); err != nil {
//           //handle error
//       }
//
//   }
package mac

import (
	"fmt"

	"github.com/google/tink/go/core/registry"
)

func init() {
	if err := registry.RegisterKeyManager(newHMACKeyManager()); err != nil {
		panic(fmt.Sprintf("mac.init() failed: %v", err))
	}
}